You must finish a full 24 hour race. This can be done on the Le Mans 24H invitational event that appears at the end of every season after 50 podium finishes in your career. You do not have to win the race and can allow the CPU to drive for you by selecting "Swap Driver" at a pit stop. To do this easily, begin a solo quick race with the following settings: time progression set to "real time", one lap, one opponent, no damage, no mechanical failures, no fuel usage, no tire wear, and no flags and penalties. You can select any car and track. When the race begins, park your car off the track where it cannot move. Allow the game to idle then cross the finish line when the timer has exceeded 1,440 minutes. Note: You can pause game play (this will also stop the timer), but cannot quit the race. With the PC version, the game will auto-pause if the game's window loses focus or computer enters sleep mode.